Abstract
This contribution discusses a near-field antenna setup capable of delivering multiple input signals with controllable (i.e., user defined) amplitude and phase relations to an antenna under test, operating in the X-band. The setup is based on a Cartesian modulation (phase and quadrature signals) of phase coherent signals, achieved employing broadband passive IQ-mixers controlled via high-resolution digital-to-analogue converters (DACs). A dedicated calibration procedure allows achieving independent phase and amplitude control on the different signal paths to compensate for loss and delay mismatches among the different channels. The capability to align the relative phases of the various paths with respect to one enables the direct testing of phased antenna arrays. The system calibration is elaborately described. The proposed Cartesian modulation is demonstrated by studying a complex antenna array, with a subset of its elements being controlled independently and phase delayed for actively controlling the far-field radiation pattern.
Original language | English |
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Title of host publication | 11th European Conference on Antennas and Propagation, EuCap 2017 |
Place of Publication | Piscataway, NJ |
Publisher | IEEE |
Pages | 2851-2855 |
Number of pages | 5 |
ISBN (Electronic) | 978-8-8907-0187-0 |
ISBN (Print) | 978-1-5090-3742-1 |
DOIs | |
Publication status | Published - 2017 |
Event | EuCAP 2017: 11th European Conference on Antennas and Propagation - Paris, France Duration: 19 Mar 2017 → 24 Mar 2017 |
Conference
Conference | EuCAP 2017 |
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Abbreviated title | EUCAP 2017 |
Country/Territory | France |
City | Paris |
Period | 19/03/17 → 24/03/17 |
Keywords
- antenna phased arrays
- antenna testing
- digital-analogue conversion
- mixers (circuits)
- phase control
- Cartesian modulation
- broadband passive IQ-mixers
- complex antenna array
- delay mismatch compensation
- far-field radiation pattern
- high-resolution DAC
- high-resolution digital-to-analogue converters
- independent amplitude control
- loss compensation
- near-field antenna setup
- phase coherent signals
- phased antenna array testing
- quadrature signal
- Antenna arrays
- Antenna measurements
- Antenna radiation patterns
- Calibration
- Europe
- Testing